WO2023135845A1 - 室内機、および空気調和機 - Google Patents

室内機、および空気調和機 Download PDF

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Publication number
WO2023135845A1
WO2023135845A1 PCT/JP2022/030214 JP2022030214W WO2023135845A1 WO 2023135845 A1 WO2023135845 A1 WO 2023135845A1 JP 2022030214 W JP2022030214 W JP 2022030214W WO 2023135845 A1 WO2023135845 A1 WO 2023135845A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
refrigerant
blower
space
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/030214
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English (en)
French (fr)
Japanese (ja)
Inventor
和樹 渡部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2023573828A priority Critical patent/JP7738680B2/ja
Publication of WO2023135845A1 publication Critical patent/WO2023135845A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices

Definitions

  • the present disclosure relates to indoor units and air conditioners.
  • This application claims priority based on PCT/JP2022/001271 filed internationally on January 17, 2022, the content of which is incorporated herein.
  • an indoor unit equipped with a refrigerant leakage sensor such as the indoor unit of an air conditioner described in Patent Document 1, is known.
  • one object of the present disclosure is to provide an indoor unit having a structure capable of suppressing malfunction of the refrigerant sensor, and an air conditioner including such an indoor unit.
  • an indoor unit of an air conditioner comprising: a housing; a heat exchanger accommodated inside the housing and through which a refrigerant flows; and a refrigerant sensor unit that has a refrigerant sensor capable of detecting the refrigerant and is attached to the housing, wherein the housing includes a blower that sends air to the heat exchanger.
  • a fan room housed inside; a heat exchanger room arranged side by side with the fan room in a first direction intersecting the vertical direction and containing the heat exchanger;
  • a partition wall partitions the interior of the heat exchanger chamber in the first direction, and an outlet opening to the outside of the housing, wherein the partition wall divides the partition wall in the first direction.
  • the blower has a through hole penetrating into the heat exchanger chamber, and the blower has a discharge port that opens toward the inside of the heat exchanger chamber, and blows air in the blower chamber into the heat exchanger chamber through the through hole
  • the heat exchanger chamber has a first space portion whose inside is connected to the discharge port, and a second space portion whose inside is connected to the blowout port, and the heat is discharged from the discharge port to the first space portion.
  • the cooled air passes through the heat exchanger, flows into the second space, and is blown out of the housing from the outlet, and the refrigerant sensor unit is installed in the housing.
  • the refrigerant sensor is mounted on a mounting wall located on one side of a second direction that intersects the vertical direction and is orthogonal to the first direction, and the refrigerant sensor is disposed in the first space and is located in the discharge port. It is placed in a position that does not face the
  • One aspect of the air conditioner according to the present disclosure includes the above indoor unit and outdoor unit.
  • FIG. 6 is a sectional view showing the indoor unit in the embodiment, taken along the line VI-VI in FIG. 5; It is a partial cross-sectional perspective view which shows some indoor units in embodiment. It is the figure which looked at a part of indoor unit in embodiment from the one side of the left-right direction.
  • FIG. 4 is a perspective view showing a state in which the refrigerant sensor unit according to the embodiment is attached to a housing;
  • the drawings show the X-axis, Y-axis, and Z-axis as appropriate.
  • the X-axis indicates one of the horizontal directions.
  • the Y-axis indicates the other horizontal direction.
  • the Z-axis indicates the vertical direction.
  • the horizontal direction along the X-axis is called “front-back direction X”
  • the horizontal direction along the Y-axis is called “left-right direction Y”
  • the vertical direction along the Z-axis is called “vertical direction Z ”.
  • the front-rear direction X, the left-right direction Y, and the vertical direction Z are directions orthogonal to each other.
  • the side of the vertical direction Z to which the Z-axis arrow points (+Z side) is defined as the upper side
  • the opposite side of the vertical direction Z to which the Z-axis arrow points (-Z side) is defined as the lower side.
  • the side of the front-back direction X to which the arrow of the X-axis points (+X side) is defined as the front side
  • the side opposite to the side of the front-back direction X to which the arrow of the X-axis faces (-X side) is defined as the rear side.
  • the side of the left-right direction Y to which the Y-axis arrow points (+Y side) is referred to as one side of the left-right direction Y
  • ⁇ Y side is referred to as the other side in the horizontal direction Y.
  • the front-rear direction X corresponds to the "first direction” that intersects the vertical direction Z
  • the left-right direction Y corresponds to the "second direction” that intersects the vertical direction Z and is orthogonal to the first direction. Equivalent to ”.
  • FIG. 1 is a schematic diagram showing a schematic configuration of an air conditioner 100 according to the present embodiment.
  • the air conditioner 100 includes an outdoor unit 10 , an indoor unit 20 and a circulation path section 60 .
  • the outdoor unit 10 is arranged outdoors.
  • the indoor unit 20 is arranged indoors.
  • the outdoor unit 10 and the indoor unit 20 are connected to each other by a circulation path part 60 through which a refrigerant 61 circulates.
  • the air conditioner 100 can adjust the temperature of the indoor air by exchanging heat between the refrigerant 61 flowing in the circulation path section 60 and the indoor air in which the indoor unit 20 is arranged.
  • the coolant 61 for example, a fluorine-based coolant or a hydrocarbon-based coolant with a low global warming potential (GWP) can be used.
  • the density of the refrigerant 61 in the gaseous state is higher than that of air.
  • the fluorine-based refrigerant with a low global warming potential is, for example, HFC32
  • the hydrocarbon-based refrigerant is, for example, R290 (propane). Both the fluorine-based refrigerant and the hydrocarbon-based refrigerant are combustible refrigerants.
  • the outdoor unit 10 includes a housing 11, a compressor 12, a heat exchanger 13, a flow control valve 14, a blower 15, a four-way valve 16, a controller 17, and cutoff valves 18a and 18b. .
  • a compressor 12, a heat exchanger 13, a flow control valve 14, a blower 15, a four-way valve 16, a controller 17, and cutoff valves 18a and 18b are housed.
  • the compressor 12 , the heat exchanger 13 , the flow control valve 14 , the four-way valve 16 , and the cutoff valves 18 a and 18 b are provided in a portion of the circulation path section 60 located inside the housing 11 .
  • Compressor 12 , heat exchanger 13 , flow regulating valve 14 , four-way valve 16 , and cutoff valves 18 a and 18 b are connected by a portion of circulation path section 60 located inside housing 11 .
  • the four-way valve 16 is provided in a portion of the circulation path section 60 that is connected to the discharge side of the compressor 12 .
  • the four-way valve 16 can reverse the direction of the coolant 61 flowing through the circulation path section 60 by switching a part of the circulation path section 60 .
  • the path connected by the four-way valve 16 is the path indicated by the solid line in the four-way valve 16 in FIG. 1
  • the refrigerant 61 flows in the circulation path section 60 in the direction indicated by the solid arrow in FIG.
  • the path connected by the four-way valve 16 is the path indicated by the dashed line in the four-way valve 16 in FIG. 1
  • the refrigerant 61 flows in the circulation path portion 60 in the direction indicated by the dashed arrow in FIG.
  • the shutoff valve 18a is provided in a portion of the circulation path portion 60 that connects the flow rate adjustment valve 14 and the heat exchanger 22 of the indoor unit 20, which will be described later.
  • the cutoff valve 18 b is provided in a portion of the circulation path section 60 that connects the four-way valve 16 and the heat exchanger 22 .
  • the shutoff valves 18a and 18b are valves that can shut off the flow of the refrigerant 61 by closing the portions of the circulation path section 60 where the shutoff valves 18a and 18b are provided.
  • the shutoff valves 18a and 18b are housed in the housing 11 of the outdoor unit 10 in the present embodiment, the present invention is not limited to this.
  • the shutoff valves 18a and 18b may be housed inside a housing 30 of the indoor unit 20, which will be described later.
  • the indoor unit 20 includes a housing 30, a heat exchanger 22, a blower 23, and a controller 24.
  • the heat exchanger 22 , the blower 23 and the controller 24 are housed inside the housing 30 .
  • the indoor unit 20 is capable of a cooling operation for cooling the air in the room in which the indoor unit 20 is arranged and a heating operation for warming the air in the room in which the indoor unit 20 is arranged.
  • the refrigerant 61 flowing through the circulation path portion 60 flows in the direction indicated by the solid arrow in FIG. That is, when the indoor unit 20 is in cooling operation, the refrigerant 61 flowing through the circulation path portion 60 is used to heat the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow rate adjustment valve 14, the shutoff valve 18a, and the indoor unit 20. It circulates back to the compressor 12 through the exchanger 22 and the isolation valve 18b in that order.
  • the heat exchanger 13 inside the outdoor unit 10 functions as a condenser
  • the heat exchanger 22 inside the indoor unit 20 functions as an evaporator.
  • the refrigerant 61 flowing through the circulation path portion 60 flows in the direction indicated by the dashed line in FIG.
  • the refrigerant 61 flowing through the circulation path portion 60 flows through the compressor 12, the shutoff valve 18b, the heat exchanger 22 of the indoor unit 20, the shutoff valve 18a, the flow rate adjustment valve 14, and the It circulates through the heat exchanger 13 of the outdoor unit 10 in this order and returns to the compressor 12 .
  • the heat exchanger 13 inside the outdoor unit 10 functions as an evaporator
  • the heat exchanger 22 inside the indoor unit 20 functions as a condenser.
  • FIG. 2 is a perspective view showing the indoor unit 20.
  • FIG. FIG. 3 is an exploded perspective view showing the indoor unit 20.
  • the indoor unit 20 is a ceiling suspended indoor unit that is attached to the ceiling.
  • the indoor unit 20 has a substantially rectangular parallelepiped shape that is elongated in the horizontal direction Y and flattened in the vertical direction Z.
  • the housing 30 of the indoor unit 20 has a lower wall portion 31, an upper wall portion 32, side wall portions 33 and 34, a front wall portion 35a, and a rear wall portion 35b.
  • the lower wall portion 31 is a wall portion positioned downward among the walls constituting the housing 30 .
  • a suction port 30 a that penetrates the lower wall portion 31 in the vertical direction Z is formed in the rear portion of the lower wall portion 31 .
  • the suction port 30a opens downward.
  • the suction port 30a has a rectangular shape elongated in the horizontal direction Y.
  • a grill 37 is attached to the suction port 30a.
  • the grill 37 has a plurality of ventilation holes passing through the grill 37 in the vertical direction Z.
  • the upper wall portion 32 is a wall portion positioned upward among the walls constituting the housing 30 .
  • the upper wall portion 32 is positioned above and apart from the lower wall portion 31 .
  • the side wall portions 33 and 34 are wall portions positioned in the left-right direction Y among the wall portions constituting the housing 30 .
  • the side wall portion 33 is a wall portion positioned on one side (+Y side) in the left-right direction Y among the wall portions constituting the housing 30 .
  • the side wall portion 34 is a wall portion positioned on the other side ( ⁇ Y side) in the left-right direction Y among the wall portions constituting the housing 30 .
  • the front wall portion 35 a is a wall portion located forward (+X direction) of the wall portions that constitute the housing 30 .
  • the rear wall portion 35b is a wall portion located in the rear ( ⁇ X direction) of the walls forming the housing 30. As shown in FIG.
  • the housing 30 has an air outlet 30b that opens to the outside of the housing 30.
  • the outlet 30b opens forward.
  • the outlet 30b is formed in the front wall portion 35a.
  • the outlet 30b extends in the left-right direction Y.
  • the blowout port 30b opens in a direction that is slightly inclined downward with respect to the front (+X direction). Indoor air sucked into the housing 30 through the suction port 30a is blown out into the room through the blowout port 30b.
  • a wind direction adjusting unit 38 that can adjust the direction of the air blown from the blower outlet 30b is arranged at the blower outlet 30b.
  • the side wall portion 33 has a mounting wall portion 33a and a cover 33b.
  • the mounting wall portion 33a has a substantially rectangular plate shape elongated in the front-rear direction X. As shown in FIG.
  • the plate surface of the mounting wall portion 33a faces the left-right direction Y.
  • the outer edge portion of the mounting wall portion 33a includes an end portion on one side in the left-right direction Y (+Y side) of the lower wall portion 31, an end portion on one side in the left-right direction Y of the upper wall portion 32, and an end portion on the one side in the left-right direction Y of the front wall portion 35a. It is attached to one end in the left-right direction Y and to one end in the left-right direction Y of the rear wall portion 35b.
  • the mounting wall portion 33a is made of metal.
  • the mounting wall portion 33a has a hole portion 33f and a mounting hole 33g passing through the mounting wall portion 33a in the left-right direction Y.
  • the hole portion 33f is formed in the rear portion of the mounting wall portion 33a.
  • the hole 33f opens downward.
  • the hole 33f is a substantially rectangular hole.
  • the mounting hole 33g is formed in the front portion of the mounting wall portion 33a.
  • the mounting hole 33g is a rectangular hole elongated in the front-rear direction X. As shown in FIG.
  • the mounting hole 33g is arranged on the upper side of the mounting wall portion 33a. That is, the center in the vertical direction Z of the mounting hole 33g is located above the center in the vertical direction Z of the mounting wall portion 33a.
  • the cover 33b is a decorative panel.
  • the cover 33b covers the mounting wall portion 33a from one side in the left-right direction Y (+Y side).
  • the cover 33b is detachably attached to the attachment wall portion 33a.
  • the cover 33b is fixed to the mounting wall portion 33a with one bolt.
  • the cover 33b is made of resin.
  • the cover 33b includes a cover body portion 33h arranged to face one side in the left-right direction Y of the mounting wall portion 33a, and a cover body portion 33h protruding from the outer peripheral edge portion of the cover body portion 33h to the other side in the left-right direction Y (-Y side). and a frame-shaped portion 33i.
  • a gap is provided between the cover body portion 33h and the mounting wall portion 33a in the left-right direction Y.
  • the mounting wall portion 33a is fitted inside the frame-shaped portion 33i.
  • FIG. 4 is a perspective view showing part of the indoor unit 20.
  • FIG. FIG. 5 is a top view of part of the indoor unit 20.
  • FIG. 6 is a cross-sectional view showing the indoor unit 20, taken along the line VI-VI in FIG.
  • FIG. 7 is a partial cross-sectional perspective view showing a part of the indoor unit 20.
  • the housing 30 has a blower chamber 71 and a heat exchanger chamber 72 arranged side by side with the blower chamber 71 in the front-rear direction X intersecting the vertical direction Z.
  • the blower chamber 71 is configured by the rear portion of the housing 30 .
  • the blower 23 is housed inside the blower chamber 71 .
  • the heat exchanger chamber 72 is configured by the front portion of the housing 30 .
  • the heat exchanger chamber 72 is positioned forward (+X direction) of the blower chamber 71 .
  • the heat exchanger 22 is housed inside the heat exchanger chamber 72 .
  • the heat exchanger 22 extends in the left-right direction Y. As shown in FIG. An end portion of the heat exchanger 22 on one side in the left-right direction Y (+Y side) is arranged away from the mounting wall portion 33a of the side wall portion 33 on the other side in the left-right direction Y ( ⁇ Y side). As shown in FIGS. 6 and 7 , the heat exchanger 22 extends upward in the left-right direction Y toward the front (+X direction).
  • a drain pan 25 is provided below the heat exchanger 22 .
  • the drain pan 25 covers the heat exchanger 22 from below.
  • the drain pan 25 is arranged on the upper surface of the lower wall portion 31 .
  • the drain pan 25 can receive the condensed water generated in the heat exchanger 22 from below. Condensed water received by the drain pan 25 is discharged to the outside through a drain hose (not shown).
  • the heat exchanger chamber 72 has a first space portion 72a and a second space portion 72b.
  • the inside of the first space portion 72a is connected to an outlet port 23e of the blower 23, which will be described later.
  • the first space portion 72a has a facing space portion 72c and a side space portion 72d.
  • the opposing space portion 72c is a portion of the first space portion 72a that faces the heat exchanger 22 in a direction perpendicular to the left-right direction Y.
  • the facing space 72c faces the heat exchanger 22 in a direction orthogonal to the left-right direction Y and intersecting both the vertical direction Z and the front-rear direction X.
  • the facing space portion 72c faces the heat exchanger 22 in the rearward direction (-X direction) as it goes upward.
  • the facing space 72c overlaps the heat exchanger 22 when viewed in the vertical direction Z.
  • the facing space portion 72c extends in the left-right direction Y.
  • the facing space portion 72 c is located above and behind the heat exchanger 22 .
  • the lateral space portion 72d is a portion of the first space portion 72a that is connected to one side (+Y side) in the left-right direction Y of the opposing space portion 72c.
  • the side space portion 72 d is located on one side in the left-right direction Y with respect to the heat exchanger 22 .
  • the side space portion 72d is arranged at a position not overlapping the heat exchanger 22 when viewed in the vertical direction Z.
  • the side space portion 72d is formed by a space 72e arranged adjacent to one side of the opposing space portion 72c in the left-right direction Y, and one side of the heat exchanger 22 in the left-right direction Y. and a space 72f located at .
  • the space 72e is connected above and behind the space 72f (-X direction).
  • the space 72f is a space located between the mounting wall portion 33a and the heat exchanger 22 in the horizontal direction Y. As shown in FIG.
  • the second space 72b is arranged adjacent to the first space 72a with the heat exchanger 22 interposed therebetween. More specifically, as shown in FIG. 7, the second space 72b and the space 72c facing the first space 72a sandwich the heat exchanger 22 in a direction orthogonal to the horizontal direction Y. It is In the present embodiment, the second space portion 72b and the opposing space portion 72c sandwich the heat exchanger 22 in the rearward direction (-X direction) as they go upward.
  • the inside of the second space 72b is connected to the outlet 30b.
  • the second space portion 72b is located obliquely downward and forward of the first space portion 72a.
  • the air discharged from the outlet 23e of the blower 23 into the first space 72a passes through the heat exchanger 22 and flows into the second space 72b.
  • the air that has flowed into the second space 72b is blown out of the housing 30 from the blowout port 30b.
  • the first space portion 72a and the second space portion 72b are partitioned by the heat exchanger 22 and the partition member 39.
  • the partition member 39 closes the space between the end portion of the heat exchanger 22 facing the second space portion 72b and the mounting wall portion 33a.
  • the partition member 39 is fixed to the mounting wall portion 33 a and the heat exchanger 22 .
  • the partition member 39 extends along the heat exchanger 22 in a direction inclined in the vertical direction Z with respect to the front-rear direction X. As shown in FIG.
  • the partition member 39 is positioned upward toward the front (+X direction).
  • the partition member 39 includes a substantially rectangular plate-shaped partition body portion 39a that closes the space between the mounting wall portion 33a and the heat exchanger 22, and a plurality of rib portions 39b provided on the upper surface of the partition body portion 39a. have.
  • the upper surface of the partition body 39a faces upward and backward (-X direction).
  • the plurality of rib portions 39b extend upward toward the front.
  • the plurality of rib portions 39b are arranged at intervals in the left-right direction Y. As shown in FIG.
  • the housing 30 has a partition wall 36 that separates the interior of the fan chamber 71 and the interior of the heat exchanger chamber 72 in the front-back direction X.
  • the partition wall portion 36 extends in the left-right direction Y.
  • the partition wall portion 36 has a substantially rectangular plate shape elongated in the horizontal direction Y.
  • the plate surface of the partition wall portion 36 faces the front-rear direction X.
  • the partition wall portion 36 has a through hole 36a that penetrates the partition wall portion 36 in the front-rear direction X.
  • the through hole 36a is a rectangular hole elongated in the horizontal direction Y.
  • a plurality of through holes 36a are arranged side by side at intervals in the left-right direction Y.
  • Four through holes 36a are provided.
  • the blower 23 sends air to the heat exchanger 22.
  • the blower 23 has a blower case 23c and a fan 23f.
  • the fan 23f is rotatable around a rotation axis R extending in the horizontal direction Y.
  • the fan 23f is a sirocco fan.
  • the blower case 23c has a case body portion 23g that houses the fan 23f, and a projecting portion 23h that projects forward (+X direction) from the upper end portion of the case body portion 23g.
  • the case main body 23g is located inside the blower chamber 71.
  • the case main body 23g has an intake port 23d that opens on one side in the left-right direction Y (+Y side).
  • the suction port 23d has a circular shape around the rotation axis R of the fan 23f.
  • a grill having a plurality of ventilation holes is arranged in the intake port 23d.
  • the projecting portion 23h is passed through the through hole 36a of the partition wall portion 36 in the front-rear direction X. As shown in FIG. A front end portion of the protruding portion 23 h is positioned within the first space portion 72 a of the heat exchanger chamber 72 .
  • the front end portion of the projecting portion 23h is positioned within the facing space portion 72c of the first space portion 72a.
  • the inside of the projecting portion 23h is connected to the inside of the case body portion 23g.
  • a front end portion of the projecting portion 23 h is a discharge port 23 e that opens toward the inside of the heat exchanger chamber 72 .
  • the discharge port 23e is arranged behind the heat exchanger 22 (in the -X direction) with a space therebetween.
  • the outlet 23 e faces the heat exchanger 22 .
  • a plurality of blowers 23 are arranged side by side in the horizontal direction Y in the present embodiment.
  • the plurality of blowers 23 includes at least one first blower 23a and a plurality of second blowers 23b provided more than the first blowers 23a.
  • a total of four blowers 23 are provided, one first blower 23a and three second blowers 23b.
  • the structure of the first blower 23a and the structure of each second blower 23b are the same.
  • the rotation axis R of the first blower 23a and the rotation axis R of the second blower 23b are arranged on the same straight line.
  • One first blower 23a is arranged in a portion of the interior of the blower chamber 71 that is closer to one side in the left-right direction Y (closer to +Y).
  • the three second fans 23b are arranged side by side in the horizontal direction Y. As shown in FIG. In the present embodiment, the three second fans 23b are arranged in the horizontal direction Y at equal intervals.
  • One second blower 23 b is arranged in the central portion in the left-right direction Y inside the blower chamber 71 .
  • the remaining two second blowers 23b are arranged in a portion of the inside of the blower chamber 71 closer to the other side in the left-right direction Y (closer to -Y).
  • the interval in the horizontal direction Y between the first fan 23a and the second fan 23b adjacent in the horizontal direction Y is larger than the interval between the second fans 23b adjacent in the horizontal direction Y.
  • the first blower 23a is located on one side (+Y side) in the horizontal direction Y of the three second blowers 23b. That is, the first blower 23a is arranged in the left-right direction Y at a position closer to the mounting wall portion 33a than the plurality of second blowers 23b.
  • the first blower 23a is the blower 23 arranged at the position closest to the mounting wall portion 33a among the plurality of blowers 23 .
  • the second blower 23b adjacent to the first blower 23a in the left-right direction Y is the blower 23 that is positioned on one side (+Y side) in the left-right direction Y among the three second blowers 23b, and the three second blowers 23b.
  • the blower 23 is closest to the mounting wall portion 33a.
  • a motor 26 is provided between the first blower 23a and the second blower 23b that are adjacent in the horizontal direction Y. As shown in FIG. The motor 26 rotates the fan 23f of each blower 23 around the rotation axis R. In this embodiment, the motor 26 rotates the fans 23f of the plurality of air blowers 23 at the same time.
  • the air in the blower chamber 71 is sucked into the case main body 23g through the suction port 23d.
  • the air sucked into the case body 23g passes through the projecting portion 23h and is discharged into the first space 72a of the heat exchanger chamber 72 through the discharge port 23e.
  • an air flow AF is generated in the heat exchanger chamber 72 that flows from the discharge port 23e through the heat exchanger 22 to the blowout port 30b.
  • the protruding portion 23h is passed through the through hole 36a, so the air passing through the protruding portion 23h passes through the through hole 36a and is discharged into the first space portion 72a.
  • the blower 23 sends the air in the blower chamber 71 into the heat exchanger chamber 72 through the through hole 36a.
  • the fan 23f rotates and the air in the blower chamber 71 is sucked into the suction port 23d, the air is sucked into the blower chamber 71 from the suction port 30a of the housing 30.
  • the indoor unit 20 includes a connection pipe portion 62 that connects refrigerant pipes 60 a and 60 b extending from the outdoor unit 10 and the heat exchanger 22 .
  • the refrigerant pipe 60a is, for example, a liquid pipe.
  • the refrigerant pipe 60b is, for example, a gas pipe.
  • the connection pipe portion 62 is configured by a plurality of pipes.
  • the connection pipe portion 62 is arranged in the first space portion 72a of the heat exchanger chamber 72 except for a connection portion 62a to which the refrigerant pipe 60a is connected and a connection portion 62b to which the refrigerant pipe 60b is connected.
  • the connecting portions 62 a and 62 b protrude into the fan chamber 71 through the partition wall portion 36 in the front-rear direction X.
  • at least part of the connecting pipe portion 62 is positioned between the mounting wall portion 33a and the heat exchanger 22 in the left-right direction Y, that is, in the space 72f of the lateral space portion 72d.
  • more than half of the connection pipe portion 62 is positioned within the space 72f between the mounting wall portion 33a and the heat exchanger 22 in the horizontal direction Y.
  • a solenoid valve 63 is provided in the connecting pipe portion 62 .
  • the connection pipe portion 62 is positioned above the partition member 39 .
  • the connecting portion between heat exchanger 22 and connecting pipe portion 62 is located in space 72f of side space portion 72d.
  • FIG. 8 is a view of part of the indoor unit 20 viewed from one side in the left-right direction Y (+Y side).
  • FIG. 8 shows the indoor unit 20 with the cover 33b removed.
  • the indoor unit 20 has a refrigerant sensor unit 40 attached to the housing 30 .
  • the refrigerant sensor unit 40 is attached to an attachment wall portion 33 a located on one side (+Y side) in the left-right direction Y of the housing 30 . More specifically, the refrigerant sensor unit 40 is detachably attached to the mounting surface 33j of the mounting wall portion 33a.
  • the mounting surface 33j is a surface facing the outside of the housing 30, that is, a surface on one side (+Y side) in the left-right direction Y of the mounting wall portion 33a.
  • FIG. 9 is a perspective view showing the refrigerant sensor unit 40.
  • FIG. 10 is a perspective view showing a state in which the refrigerant sensor unit 40 is attached to the housing 30.
  • the refrigerant sensor unit 40 has a substantially rectangular parallelepiped shape elongated in the front-rear direction X. As shown in FIG. As shown in FIG. 10 , the refrigerant sensor unit 40 has a sensor case 41 and a refrigerant sensor 43 . The refrigerant sensor unit 40 also has a circuit board (not shown). A circuit board (not shown) is housed inside a sensor housing portion 41b, which will be described later. The circuit board is electrically connected to the controller 24 of the indoor unit 20 via electrical wiring 44, which will be described later.
  • the sensor case 41 accommodates a circuit board (not shown) and a refrigerant sensor 43 inside. As shown in FIG. 10, the sensor case 41 has a base portion 41a, a sensor housing portion 41b, a fixed portion 41c, and an engaging portion 41i.
  • the base 41a has a substantially rectangular parallelepiped shape that is long in the front-rear direction X and flat in the left-right direction Y. When viewed in the left-right direction Y, the outer edge of the base portion 41a is located outside the mounting hole 33g of the mounting wall portion 33a and surrounds the mounting hole 33g. The base portion 41a is in contact with the peripheral portion of the mounting hole 33g on the mounting surface 33j of the mounting wall portion 33a. The base 41 a is located outside the heat exchanger chamber 72 . In the present embodiment, the base portion 41a is detachably attached to the attachment wall portion 33a outside the heat exchanger chamber 72 via the fixed portion 41c and the engaging portion 41i.
  • the sensor housing portion 41b protrudes from the base portion 41a to the other side (-Y side) in the horizontal direction Y and is passed through the mounting hole 33g.
  • the sensor housing portion 41b protrudes into the first space portion 72a. More specifically, the sensor housing portion 41b protrudes into the side space portion 72d of the first space portion 72a.
  • the sensor housing portion 41b is arranged in a portion closer to the front (+X side) inside the first space portion 72a.
  • the sensor housing portion 41b is exposed in a space 72f located between the heat exchanger 22 and the mounting wall portion 33a in the horizontal direction Y in the first space portion 72a. As shown in FIG.
  • the sensor accommodating portion 41b is arranged at a position overlapping the heat exchanger 22 when viewed in the left-right direction Y. As shown in FIG. In the present embodiment, the sensor housing portion 41b overlaps the upper portion of the heat exchanger 22 when viewed in the left-right direction Y. As shown in FIG.
  • the sensor housing portion 41b is located forward (+X direction) of the first blower 23a.
  • the sensor housing portion 41b is arranged at a position closer to the mounting wall portion 33a than the first blower 23a.
  • the sensor housing portion 41b is arranged away from the first air blower 23a on one side in the left-right direction Y (+Y side).
  • the sensor housing portion 41b is arranged at a position not facing the discharge port 23e of the blower 23.
  • the sensor accommodating portion 41b is arranged at a position that does not overlap with the ejection port 23e.
  • the sensor housing portion 41b is arranged outside the air passage from the discharge port 23e to the heat exchanger 22. As shown in FIG.
  • the sensor housing portion 41 b is positioned above the drain pan 25 .
  • the sensor housing portion 41b houses the refrigerant sensor 43 inside.
  • the sensor housing portion 41b has a substantially rectangular parallelepiped shape.
  • a portion of the upper surface of the sensor accommodating portion 41b on the other side ( ⁇ Y side) in the horizontal direction Y is an inclined surface 41k.
  • the inclined surface 41k is positioned downward toward the other side in the left-right direction Y.
  • the sensor housing portion 41b has an opening portion 41h that opens to the first space portion 72a.
  • the opening 41h is provided at the rear end of the lower end of the sensor accommodating portion 41b.
  • the opening 41h connects the inside of the sensor accommodating portion 41b and the inside of the first space portion 72a.
  • the fixed portion 41c protrudes rearward (-X direction) from the base portion 41a.
  • the fixed portion 41c has a bolt hole 41d passing through the fixed portion 41c in the horizontal direction Y.
  • a bolt 41m is passed through the bolt hole 41d from one side in the left-right direction Y (+Y side).
  • the bolt 41m is screwed into a nut 33d fixed to the mounting wall portion 33a.
  • the nut 33d is fixed to the surface of the mounting wall portion 33a on the other side (-Y side) in the horizontal direction Y, that is, the surface facing the first space portion 72a.
  • the nut 33d is fixed to a surface of the side space portion 72d of the first space portion 72a facing the space 72f.
  • the engaging portion 41i protrudes forward (+X direction) from the base portion 41a.
  • the engaging portion 41i protrudes into the first space portion 72a through an engaging hole 33c provided in the mounting wall portion 33a from the outside of the heat exchanger chamber 72.
  • the engaging portion 41i protrudes into the space 72f of the side space portion 72d of the first space portion 72a.
  • the engaging portion 41i is hooked from the inside of the first space portion 72a to the front portion of the peripheral portion of the engaging hole 33c in the mounting wall portion 33a.
  • the sensor case 41 includes a protruding plate portion 41e protruding rearward (-X direction) from the base portion 41a, and a cover protruding from the protruding plate portion 41e to the other side in the left-right direction Y (-Y side). and a fitting portion 41f.
  • the projecting plate portion 41e and the fitted portion 41f are located below the fixed portion 41c.
  • the projecting plate portion 41e has a substantially square plate shape.
  • the plate surface of the projecting plate portion 41e faces the left-right direction Y.
  • the fitted portion 41f has a cylindrical shape. As shown in FIG.
  • the fitted portion 41f is fitted from the outside of the heat exchanger chamber 72 into a fitting hole 33e provided in the mounting wall portion 33a.
  • the fitting hole 33e is a circular hole passing through the mounting wall portion 33a in the left-right direction Y. As shown in FIG.
  • the refrigerant sensor unit 40 is attached to the mounting wall portion 33a by engaging the engaging portion 41i with the mounting wall portion 33a and fitting the fitted portion 41f into the fitting hole 33e. positioned.
  • the refrigerant sensor unit 40 can be attached to and detached from the mounting wall portion 33a by fixing the fixed portion 41c to the mounting wall portion 33a with a bolt 41m while being positioned by the engaging portion 41i and the fitted portion 41f. attached to the In a state where the engaging portion 41i is engaged with the mounting wall portion 33a and the fitted portion 41f is fitted in the fitting hole 33e, the refrigerant sensor unit 40 can be detected even when the fixed portion 41c is not fixed. It is temporarily held with respect to the mounting wall portion 33a. Therefore, when the refrigerant sensor unit 40 is attached to or detached from the mounting wall portion 33a, it is possible to prevent the refrigerant sensor unit 40 from falling.
  • the sensor case 41 is configured by connecting a first case member 41r and a second case member 41s in the left-right direction Y.
  • the first case member 41r has a rectangular frame-shaped frame portion 41j elongated in the front-rear direction X, a projecting plate portion 41e, and a fitted portion 41f.
  • the first case member 41r has a sensor accommodating portion 41b that protrudes to the other side in the horizontal direction Y (-Y side).
  • the sensor housing portion 41b protrudes to the other side in the horizontal direction Y from the inner edge of the frame portion 41j.
  • the second case member 41s is attached to one side (+Y side) in the left-right direction Y of the first case member 41r.
  • the second case member 41s has a lid portion 41t that covers the frame portion 41j and the sensor housing portion 41b from one side in the left-right direction Y, a fixed portion 41c, and an engaging portion 41i.
  • the base portion 41a is configured by the frame portion 41j and the lid portion 41t.
  • the refrigerant sensor 43 is a sensor that can detect the refrigerant 61 .
  • the refrigerant sensor 43 is attached to a circuit board (not shown).
  • the refrigerant sensor 43 has a detection portion that detects the refrigerant 61 .
  • the refrigerant sensor 43 outputs a signal indicating detection of the refrigerant 61 when the refrigerant 61 comes into contact with the detection portion.
  • a signal output from the refrigerant sensor 43 is input to the controller 24 of the indoor unit 20 via an electrical wiring 44, which will be described later.
  • the refrigerant 61 that has leaked from the circulation path portion 60 and flowed into the first space portion 72a flows into the sensor case 41 through the opening portion 41h of the sensor housing portion 41b.
  • a detection portion of the refrigerant sensor 43 can be contacted. Note that the refrigerant 61 leaking from the circulation path portion 60 is gaseous.
  • the refrigerant sensor 43 is housed in the sensor housing portion 41b and arranged in the first space portion 72a.
  • the refrigerant sensor 43 is arranged in a portion near the front (+X side) inside the first space portion 72a.
  • the refrigerant sensor 43 is arranged in a portion of the inside of the first space portion 72a on the far side (+X side) from the blower chamber 71 in the front-rear direction X.
  • a portion of the interior of the first space 72a that is farther from the blower chamber 71 in the front-rear direction X means that the part of the first space 72a that is closer to the center of the first space 72a in the front-rear direction X than the center of the first space 72a. It is a portion on the far side in the front-rear direction X from the chamber 71, and is a portion located forward (+X direction) of the center of the first space portion 72a in the front-rear direction X in the present embodiment.
  • the refrigerant sensor 43 is arranged inside the side space portion 72d.
  • the refrigerant sensor 43 is located forward (+X direction) of the center of the side space portion 72d in the front-rear direction X.
  • the refrigerant sensor 43 is located in a portion of the side space 72d located between the heat exchanger 22 and the mounting wall 33a in the left-right direction Y, that is, the space 72f.
  • the refrigerant sensor 43 is arranged in the front portion of the interior of the side space portion 72d, that is, the portion on the side farther from the blower chamber 71 in the front-rear direction X (+X side).
  • Refrigerant sensor 43 is positioned above partition member 39 .
  • the refrigerant sensor 43 is located forward (+X direction) of the solenoid valve 63 . As shown in FIG. 6 , the refrigerant sensor 43 is arranged at a position overlapping the heat exchanger 22 when viewed in the horizontal direction Y. As shown in FIG. In the present embodiment, the refrigerant sensor 43 overlaps the upper portion of the heat exchanger 22 when viewed in the horizontal direction Y. As shown in FIG.
  • the refrigerant sensor 43 is located forward (+X direction) of the first blower 23a.
  • the refrigerant sensor 43 is arranged at a position closer to the mounting wall portion 33a than the first blower 23a.
  • the refrigerant sensor 43 is arranged away from the first blower 23a on one side in the horizontal direction Y (+Y side).
  • the refrigerant sensor 43 is arranged at a position not facing the discharge port 23 e of the blower 23 .
  • the refrigerant sensor 43 is arranged at a position that does not overlap the discharge port 23e.
  • the refrigerant sensor 43 is arranged outside the air passage from the discharge port 23 e to the heat exchanger 22 .
  • the refrigerant sensor 43 is positioned above the drain pan 25 .
  • the refrigerant sensor unit 40 is attached to the attachment wall portion 33a detachably from the outside of the heat exchanger chamber 72.
  • An operator who removes the refrigerant sensor unit 40 first removes the cover 33b from the mounting wall portion 33a.
  • the indoor unit 20 is brought into the state shown in FIG. 8 and the refrigerant sensor unit 40 is exposed to the outside of the indoor unit 20 .
  • the operator removes the bolt 41m that fixes the fixed portion 41c, and removes the refrigerant sensor unit 40 from the mounting wall portion 33a.
  • the indoor unit 20 includes electrical wiring 44 that electrically connects the refrigerant sensor unit 40 and the controller 24 .
  • the electric wiring 44 is electrically connected to a circuit board (not shown) in the refrigerant sensor unit 40 and a control board (not shown) in the controller 24 .
  • the electric wiring 44 is drawn downward from the front end portion of the lower end portion of the refrigerant sensor unit 40, extends rearward, enters the fan chamber 71 through the hole 33f, and is connected to the controller 24 disposed in the fan chamber 71. It is connected to the.
  • the electrical wiring 44 extends from the refrigerant sensor unit 40 to the hole 33f through the space between the mounting wall 33a and the cover 33b in the horizontal direction Y. As shown in FIG. That is, a portion of the electrical wiring 44 is positioned between the mounting wall portion 33a and the cover 33b.
  • the controller 24 is arranged at the rear end inside the fan chamber 71 .
  • a remote controller 50 arranged outside the indoor unit 20 is connected to the controller 24 by wire.
  • the controller 24 controls the indoor unit 20 based on signals from the remote controller 50 .
  • the control unit 24 controls the blower 23 and the wind direction adjustment unit 38 .
  • the control unit 24 controls the blower 23 by controlling the motor 26 .
  • the controller 24 is positioned above the rear end of the suction port 30a.
  • the control unit 24 has a control unit case 24a that accommodates a control board (not shown) inside.
  • the control unit case 24a has a case body 24b and a lid body 24c attached to the front (+X direction) of the case body 24b.
  • the lid body 24c has a first lid portion 24d that covers the case body 24b from below and a second lid portion 24e that covers the case body 24b from the front.
  • the second lid portion 24e extends upward from the front end portion of the first lid portion 24d.
  • the lid body 24c is L-shaped when viewed in the left-right direction Y. As shown in FIG.
  • the lid body 24c is detachably fixed to the case body 24b by fixing the first lid part 24d to the case body 24b with bolts. With the grille 37 removed from the suction port 30a, the operator can remove the bolt that secures the first lid portion 24d to the case body 24b through the suction port 30a, and the lid member 24c can be attached to the case. It can be removed from the main body 24b. Accordingly, the operator can attach and detach the electrical wiring 44 to and from the control board (not shown) accommodated in the control unit case 24a.
  • the refrigerant sensor 43 When the refrigerant sensor 43 outputs a signal indicating that the refrigerant 61 has been detected, the signal is input to the control section 24 via the circuit board of the refrigerant sensor unit 40 and the electrical wiring 44 .
  • the controller 24 sends a signal indicating that the refrigerant sensor 43 has detected the refrigerant 61 to the controller 17 of the outdoor unit 10 .
  • the control unit 17 of the outdoor unit 10 controls the shutoff valves 18a and 18b to recover the refrigerant 61 in the portion of the circulation path unit 60 located inside the indoor unit 20 into the outdoor unit 10.
  • the flow of refrigerant 61 from outdoor unit 10 to indoor unit 20 is stopped. This suppresses further leakage of the refrigerant 61 into the interior of the indoor unit 20 .
  • the controller 17 of the outdoor unit 10 notifies that the refrigerant 61 is leaking.
  • the refrigerant sensor 43 Even when the refrigerant sensor 43 does not detect the refrigerant 61, the refrigerant sensor 43 outputs a signal to the controller 24 indicating that the refrigerant sensor 43 is operating normally.
  • the control unit 24 determines that the refrigerant sensor 43 is operating normally by receiving the signal. On the other hand, when the signal cannot be received, the controller 24 determines that the refrigerant sensor 43 has failed, and sends a signal indicating that the refrigerant sensor 43 has failed to the controller 17 of the outdoor unit 10 . When receiving the signal, the controller 17 of the outdoor unit 10 notifies that the refrigerant sensor 43 is out of order.
  • blower 23 has discharge port 23e that opens into heat exchanger chamber 72, and blows air in blower chamber 71 to heat exchanger chamber 72 through through hole 36a. send in.
  • the heat exchanger chamber 72 has a first space 72a internally connected to the discharge port 23e and a second space 72b internally connected to the blowout port 30b.
  • the air discharged from the discharge port 23e into the first space 72a passes through the heat exchanger 22, flows into the second space 72b, and is blown out of the housing 30 from the discharge port 30b.
  • the refrigerant sensor unit 40 is attached to a mounting wall portion 33a located on one side (+Y side) of the left-right direction Y intersecting the vertical direction Z and perpendicular to the front-rear direction X in the housing 30 .
  • the refrigerant sensor 43 is arranged in the first space portion 72a and is arranged at a position not facing the discharge port 23e. Therefore, the air discharged from the discharge port 23 e of the blower 23 is prevented from directly hitting the refrigerant sensor 43 .
  • miscellaneous gas such as insecticide
  • the miscellaneous gas can be prevented from contacting the refrigerant sensor 43 . Therefore, it is possible to prevent the refrigerant sensor 43 from malfunctioning due to the miscellaneous gas.
  • miscellaneous gases that may be mixed in indoor air include L gas contained in insecticides and siloxane contained in hair sprays.
  • a connecting portion between the heat exchanger 22 and the connecting pipe portion 62 is an example of a portion where the refrigerant 61 in the circulation path portion 60 tends to leak into the indoor unit 20 . Since the connection portion is provided in the first space portion 72a of the heat exchanger chamber 72, by providing the refrigerant sensor 43 in the first space portion 72a, when the refrigerant 61 leaks from the connection portion, the leakage is detected. The refrigerant sensor 43 can easily detect the refrigerant 61 .
  • connection portions 62 a and 62 b between the refrigerant pipes 60 a and 60 b from the outdoor unit 10 and the connection pipe portion 62 are also examples of locations where the refrigerant 61 in the circulation path portion 60 tends to leak into the indoor unit 20 .
  • the connection portions 62 a and 62 b are arranged inside the fan chamber 71 , and the inside of the fan chamber 71 is connected to the inside of the first space portion 72 a of the heat exchanger chamber 72 via the inside of the fan 23 . Therefore, the refrigerant 61 leaking from the connecting portions 62a and 62b can flow through the inside of the blower 23 into the first space portion 72a.
  • refrigerant 61 leaking from connection portions 62a and 62b can also be detected by refrigerant sensor 43 arranged in first space portion 72a.
  • the refrigerant sensor 43 can appropriately detect the refrigerant 61 that has leaked from a portion of the circulation path portion 60 where the refrigerant 61 easily leaks into the indoor unit 20. can be detected.
  • the refrigerant sensor 43 can suitably detect the refrigerant 61 that has leaked into the indoor unit 20 while suppressing malfunction of the refrigerant sensor 43 .
  • the refrigerant sensor 43 is arranged in the first space 72a, compared to the case where the refrigerant sensor 43 is arranged in a portion of the sensor case 41 outside the first space 72a, The time until the leaked refrigerant 61 contacts the refrigerant sensor 43 can be shortened. This makes it easier for the refrigerant sensor 43 to quickly detect the refrigerant 61 .
  • the refrigerant sensor 43 Since the refrigerant sensor 43 is arranged at a position not facing the discharge port 23e, when the blower 23 is discharging air from the discharge port 23e, the refrigerant 61 leaking from the connection portions 62a and 62b It is blown into the room through the heat exchanger 22 together with the air flow AF generated by 23 . In this case, the refrigerant 61 leaking from the connecting portions 62 a and 62 b is less likely to contact the refrigerant sensor 43 . However, in this case, the coolant 61 leaking from the connecting portions 62a and 62b is diffused into the room, so that the coolant 61 is prevented from staying in the room.
  • the indoor unit 20 when the indoor unit 20 is in cooling operation, condensed water adheres to the surface of the heat exchanger 22 due to condensation. Therefore, when the airflow AF passes through the heat exchanger 22, the condensed water may be blown into the second space 72b by the airflow AF. Therefore, if the refrigerant sensor 43 were arranged in the second space 72b, the condensed water blown by the air flow AF would adhere to the refrigerant sensor 43, and the detection accuracy of the refrigerant sensor 43 might be lowered. Moreover, the refrigerant sensor 43 may be damaged by the condensed water.
  • the refrigerant sensor 43 is arranged in the first space 72a through which the airflow AF before passing through the heat exchanger 22 passes. Therefore, it is possible to prevent condensation water from adhering to the refrigerant sensor 43 . This can prevent the detection accuracy of the refrigerant sensor 43 from deteriorating and prevent the refrigerant sensor 43 from malfunctioning. Therefore, it is possible to extend the life of the refrigerant sensor 43 while maintaining the detection accuracy of the refrigerant sensor 43 .
  • the first space portion 72a includes a facing space portion 72c that faces the heat exchanger 22 in a direction orthogonal to the left-right direction Y, and one side of the heat exchanger 22 in the left-right direction Y ( +Y side), and a side space portion 72d connected to one side in the left-right direction Y of the opposing space portion 72c.
  • the refrigerant sensor 43 is arranged in the side space portion 72d.
  • the connecting portion between the heat exchanger 22 and the connecting pipe portion 62 is likely to be arranged in the side space portion 72d as in the present embodiment. Therefore, by providing the refrigerant sensor 43 in the side space portion 72d, when the refrigerant 61 leaks from the connecting portion, the refrigerant sensor 43 can easily detect the leaked refrigerant 61 more preferably.
  • the refrigerant sensor 43 is arranged at a position overlapping the heat exchanger 22 when viewed in the left-right direction Y. Therefore, direct contact with the refrigerant sensor 43 by the air discharged from the discharge port 23 e of the blower 23 can be more preferably suppressed. Thus, even if the air discharged from the discharge port 23e contains miscellaneous gases, malfunction of the refrigerant sensor 43 can be suppressed more favorably. Moreover, even if foreign matter is contained in the air discharged from the discharge port 23e, it is possible to further prevent the detection accuracy of the refrigerant sensor 43 from deteriorating.
  • the connecting portion between the heat exchanger 22 and the connecting pipe portion 62 is the space 72f between the mounting wall portion 33a and the heat exchanger 22 in the left-right direction Y in the side space portion 72d as in the present embodiment. easy to be placed in Therefore, by arranging the refrigerant sensor 43 at a position overlapping the heat exchanger 22 when viewed in the left-right direction Y and arranging the refrigerant sensor 43 in the space 72f, when the refrigerant 61 leaks from the connection portion, the leakage Refrigerant sensor 43 can more preferably detect refrigerant 61 .
  • the refrigerant sensor 43 can be arranged at a position close to the connecting pipe portion 62 . This makes it easier for the refrigerant sensor 43 to more preferably detect the refrigerant 61 that has leaked from the connecting portion between the connecting pipe portion 62 and the heat exchanger 22 . Further, as described above, by arranging the refrigerant sensor 43 at a position overlapping the heat exchanger 22 when viewed in the left-right direction Y, the refrigerant sensor 43 can be arranged closer to the connecting pipe portion 62 . Therefore, the refrigerant sensor 43 can easily detect the refrigerant 61 leaking from the connecting portion between the connecting pipe portion 62 and the heat exchanger 22 more preferably.
  • the connecting portions 62a and 62b to which the refrigerant pipes 60a and 60b are connected in the connecting pipe portion 62 penetrate the partition wall portion 36 in the front-rear direction X and protrude into the fan chamber 71. ing. Even if a part of the connecting pipe portion 62 is located inside the fan chamber 71 in this manner, the refrigerant 61 leaking from the connecting portions 62a and 62b passes through the inside of the fan 23 and flows into the first space portion as described above. It is possible to flow into 72a. Therefore, refrigerant 61 leaking from connection portions 62a and 62b can also be detected by refrigerant sensor 43 arranged in first space portion 72a.
  • the housing 30 has the cover 33b that covers the mounting wall portion 33a from one side in the left-right direction Y (+Y side).
  • a portion of the electrical wiring 44 that electrically connects the refrigerant sensor unit 40 and the controller 24 is arranged between the mounting wall portion 33a and the cover 33b. Therefore, it is possible to prevent the electrical wiring 44 from being exposed to the outside of the indoor unit 20 . As a result, damage to the electrical wiring 44 can be suppressed.
  • the refrigerant sensor unit 40 is attached to the attachment wall portion 33a so as to be detachable from the outside of the heat exchanger chamber 72. Therefore, when the refrigerant sensor unit 40 fails, the operator can easily replace the refrigerant sensor unit 40 from the outside of the heat exchanger chamber 72 .
  • the refrigerant sensor unit 40 can be exposed to the outside of the indoor unit 20 simply by removing the cover 33b. Therefore, the refrigerant sensor unit 40 can be easily removed without removing the heat exchanger 22 and the drain pan 25 while the indoor unit 20 is installed on the ceiling.
  • the mounting wall portion 33a has the mounting hole 33g penetrating in the left-right direction Y through the mounting wall portion 33a.
  • the refrigerant sensor unit 40 has a sensor case 41 that accommodates the refrigerant sensor 43 therein.
  • the sensor case 41 has a base portion 41a that is detachably attached to the mounting wall portion 33a outside the heat exchanger chamber 72, and a sensor housing portion 41b that houses the refrigerant sensor 43 therein.
  • the sensor accommodating portion 41b protrudes in the left-right direction Y from the base portion 41a, passes through the mounting hole 33g, and protrudes into the first space portion 72a. Therefore, while the refrigerant sensor unit 40 is detachably attached to the mounting wall portion 33a from the outside of the heat exchanger chamber 72, the refrigerant sensor 43 can be easily arranged in the first space portion 72a.
  • a plurality of blowers 23 are arranged side by side in the left-right direction Y.
  • the plurality of blowers 23 includes one first blower 23a and a plurality of second blowers 23b arranged side by side in the left-right direction Y and provided in a larger number than the first blowers 23a.
  • One first blower 23a is arranged in the left-right direction Y at a position closer to the mounting wall portion 33a than the plurality of second blowers 23b.
  • the interval in the horizontal direction Y between the first fan 23a and the second fan 23b adjacent in the horizontal direction Y is larger than the interval between the second fans 23b adjacent in the horizontal direction Y.
  • the second blowers 23b which are larger in number than the first blowers 23a, can be arranged at positions relatively distant in the left-right direction Y from the mounting wall portion 33a.
  • a relatively large number of blowers 23 among the plurality of blowers 23 can be arranged relatively far in the left-right direction Y from the refrigerant sensor 43 attached to the mounting wall portion 33a. Therefore, even if the air discharged from the plurality of fans 23 contains miscellaneous gas, it is possible to more preferably prevent the miscellaneous gas from contacting the refrigerant sensor 43 . Therefore, malfunction of the refrigerant sensor 43 can be more preferably suppressed.
  • the indoor unit 20 includes the drain pan 25 positioned below the heat exchanger 22 in the vertical direction Z.
  • the refrigerant sensor 43 is positioned above the drain pan 25 in the vertical direction Z. As shown in FIG. Therefore, the leaked refrigerant 61 is received by the drain pan 25 in the heat exchanger chamber 72 and is prevented from flowing downward. As a result, the leaked refrigerant 61 can be prevented from leaking out of the indoor unit 20 before being detected by the refrigerant sensor 43 .
  • the leaked refrigerant 61 When the leaked refrigerant 61 accumulates on the drain pan 25 to some extent, the leaked refrigerant 61 comes into contact with the refrigerant sensor 43 arranged above the drain pan 25 , and the refrigerant 61 can be detected by the refrigerant sensor 43 .
  • the drain pan 25 By arranging the drain pan 25 in this way, even if the refrigerant sensor 43 is arranged somewhat upward, the leaked refrigerant 61 can be detected by the refrigerant sensor 43 before the leaked refrigerant 61 leaks into the room. Cheap.
  • the leaked refrigerant 61 can be preferably detected by the refrigerant sensor 43 while the refrigerant sensor 43 is attached to the upper portion of the mounting wall portion 33a in order to avoid interference with the connecting pipe portion 62 and the like.
  • the refrigerant 61 that leaks from the connection portions 62a and 62b and flows into the heat exchanger chamber 72 from the discharge port 23e of the blower 23 flows forward (+X direction) from the discharge port 23e.
  • the refrigerant sensor 43 is close to the discharge port 23e of the blower 23 in the front-rear direction X, the refrigerant 61 flowing forward from the discharge port 23e does not contact the refrigerant sensor 43 arranged at a position not facing the discharge port 23e.
  • the refrigerant 61 may pass the refrigerant sensor 43 in the front-rear direction X, and it may take time for the refrigerant 61 to reach the refrigerant sensor 43 .
  • the refrigerant sensor 43 is arranged on the far side (+X side) from the blower chamber 71 in the front-rear direction X in the interior of the first space 72a. Therefore, the refrigerant sensor 43 can be arranged at a position relatively far from the discharge port 23e of the blower 23 in the front-rear direction X. As shown in FIG. As a result, while the refrigerant 61 flowing forward (+X direction) from the discharge port 23e flows to the position of the refrigerant sensor 43 in the front-rear direction X, the refrigerant 61 easily spreads in the lateral direction Y, and the position does not face the discharge port 23e.
  • Refrigerant 61 is likely to come into contact with refrigerant sensor 43 arranged at . Therefore, the time required for the refrigerant 61 flowing into the heat exchanger chamber 72 from the discharge port 23e to reach the refrigerant sensor 43 can be shortened, and the refrigerant 61 can be quickly detected by the refrigerant sensor 43 .
  • the refrigerant sensor may be any type of sensor as long as it can detect the refrigerant.
  • the refrigerant sensor may be arranged in any position as long as it is arranged in the first space and is arranged in a position not facing the discharge port.
  • the refrigerant sensor 43 may be arranged in the facing space portion 72c, or may be arranged in the space 72e of the side space portion 72d.
  • the refrigerant sensor unit may be attached to the attachment wall in a non-detachable manner from the outside of the heat exchanger chamber.
  • the electrical wiring that electrically connects the refrigerant sensor unit and the controller of the indoor unit may be located entirely between the mounting wall and the cover.
  • the blower may have a discharge port at any position as long as the air in the blower chamber can be sent to the heat exchanger chamber via the through hole provided in the partition wall.
  • the outlet of the blower may be arranged in the blower chamber at a position facing the through hole provided in the partition wall.
  • the fan sends the air in the fan room to the heat exchanger room through the through hole provided in the partition wall means that the air sucked into the fan inlet reaches the heat exchanger room. It is sufficient that the air blower can send air so as to pass through the through hole provided in the partition wall portion until the time.
  • the number of blowers is not particularly limited as long as it is one or more.
  • the number of first blowers may be two or more as long as it is less than the number of second blowers.
  • the interval at which the plurality of fans are arranged is not particularly limited.

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  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
PCT/JP2022/030214 2022-01-17 2022-08-08 室内機、および空気調和機 Ceased WO2023135845A1 (ja)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025187031A1 (ja) * 2024-03-08 2025-09-12 三菱電機株式会社 室内機、および空気調和機
WO2025187558A1 (ja) * 2024-03-08 2025-09-12 株式会社富士通ゼネラル 空気調和装置の室内ユニット
WO2025215816A1 (ja) * 2024-04-12 2025-10-16 三菱電機株式会社 室内機、および空気調和機
WO2025248813A1 (ja) * 2024-05-28 2025-12-04 三菱電機株式会社 空気調和機の室内機

Citations (3)

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